Is it just one project or all the projects in your launcher? Try deleting persistent data of your project. Click the Delete Persistent button from renpy launcher and see if that fixes it.
Uninstalling the launcher should have fixed your problem but if it still doesn't work try the following:
- Run the launcher as admin
- Compatibility mode to windows 7
If all else fails then do this:
- Uninstall renpy launcher
- Uninstall python from control panel(if you don't have it, skip this step)
- Download and install latest version of python:
https://www.python.org
- Download and install fresh copy of launcher from :
https://www.renpy.org/latest.html (it might be best to download it again in case your already downloaded installer may be faulty)
Even if after all that it still doesn't work, just say and I'll try to upload my working version of renpy and we can see from there if the problem really is on the launcher itself or your system. Also, we both have the same graphics card:
Nvidia Geforce 940m So I can help you if it's a problem with the graphics card in itself.